Anion exchange membranes with a semi-interpenetrating polymer network using 1,6-dibromohexane as bifunctional crosslinker  

作　　者：Aijie Li Zhanliang Wang Zhihao Si Lu Lu Peipei Huang Jinhong Liu Songyuan Yao Peiyong Qin Xinmiao Zhang 

机构地区：[1]National Energy R&D Center for Biorefinery,College of Life Science and Technology,Beijing University of Chemical Technology,Beijing 100029,China [2]Paris Curie Engineer School,Beijing University of Chemical Technology,Beijing 100029,China [3]Environmental Protection Research Institute,Beijing Research Institute of Chemical Industry,Beijing 100000,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第8期199-208,共10页中国化学工程学报（英文版）

基　　金：funded by National Natural Science Foundation of China(22278023,22208010);Beijing Municipal Science and Technology Planning Project(Z221100002722002);Bingtuan Science and Technology Program(2022DB025);Beijing Natural Science Foundation(2222015);Sinopec Group(323034);the long-term from the Ministry of Finance and the Ministry of Education of PRC。

摘　　要：An anion exchange membrane(AEM)is generally expected to possess high ion exchange capacity(IEC),low water uptake(WU),and high mechanical strength when applied to electrodialysis desalination.Among different types of AEMs,semi-interpenetrating polymer networks(SIPNs)have been suggested for their structural superiorities,i.e.,the tunable local density of ion exchange groups for IEC and the restrained leaching of hygroscopic groups by insolubility for WU.Unfortunately,the conventional SIPN AEMs still struggle to balances IEC,WU,and mechanical strength simultaneously,due to the lack of the compact crosslinking region.In this work,we proposed a novel SIPN structure of polyvinylidene difluoride/polyvinylimidazole/1,6-dibromohexane(PVDF/PVIm/DBH).On the one hand,DBH with two cationic groups of imidazole groups are introduced to enhance the ion conductivity,which is different from the conventional monofunctional modifier with only one cationic group.On the other hand,DBH has the ability to bridge with PVIm,where the mechanical strength of the resulting AEM is increased by the increase of crosslinking degree.Results show that a low WU of 38.1%to 62.6%,high IEC of 2.12—2.22 mmol·g^(-1),and excellent tensile strength of 3.54—12.35 MPa for PVDF/PVIm/DBH membrane are achieved.This work opens a new avenue for achieving the high-quality AEMs.

关 键 词：Anion exchange membrane Polyvinylidene difluoride ELECTRODIALYSIS Semi-interpenetrating polymer networks 

分 类 号：TQ425.236[化学工程] P747[天文地球—海洋科学]